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Let PQ and RS be tangents at the extremi...

Let PQ and RS be tangents at the extremities of the diameter PR of a circle of radius r. If PS and RQ intersect at apoint X on the circumference of the circle, then 2r equals `:`

A

`sqrt( PQ. RS )`

B

`( PQ+RS)/( 2)`

C

`( 2PQ.RS)/( PQ+RS)`

D

`sqrt((PQ^(2) +RS^(2))/( 2))`

Text Solution

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The correct Answer is:
A
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